This. I would recommend anyone interested take a look at a kerosene lamp [1] (not sure if "lamp oil" that you can get is still just kerosene) but they've always had a similar effect on me. The color is nice but they are plenty bright to read by. I grew up with them and find them very calming but they are a little more stable and the flame is not totally open. You might be able to get away with less of them than candles as well making it safer. I would recommend nodding off and leaving it going all night but it won't melt and tip over by itself, it would likely just keep burning until it ran out of fuel or the wick burned out.

[1] https://www.amazon.com/Lamplight-110-Chamber-Oil-Lamp/dp/B00...